\part{part}
	part text
	part text
	\chapter{chapter long title}
	 chapter text
	 chapter text
	 \[
		 f(x)=x^2
	 \]
	 \section[for the toc]{section}
	  section text
	  section text
	 \section[for the toc]{section}
	  section text
	  section text
	  \subsection[for the toc]{subsection}
		  subsection text
		  subsection text
	  \subsection[for the toc]{subsection}
		  subsection text
		  subsection text
	 \section[for the toc]{section}
	  section text
	  section text
	\chapter{chapter}
	 chapter text
	 chapter text
\part{part}
	part text
	part text
	\chapter[toc]{chapter title}
	 chapter text
	 chapter text
	 \section[for the toc]{section}
	  section text
	  section text
	  \subsubsection[for the toc]{subsubsection}
		  subsubsection text
		  subsubsection text
		  \paragraph{paragraph}
			  paragraph text
			  paragraph text
			  \subparagraph{subparagraph}
				  subparagraph text
				  subparagraph text
	 \section[for the toc]{section}
	  section text
	  section text
	  \subsubsection[for the toc]{subsubsection}
		  subsubsection text
		  subsubsection text
		  \paragraph{paragraph}
			  paragraph text
			  paragraph text
			  \subparagraph{subparagraph}
				  subparagraph text
				  subparagraph text
	\chapter[somethingelse]{goes here}
